Move object module to root

[HalidOdat]

Same as #674

It changes the following:

• Move object module (only the non-buitin stuff) to root
• Abstract global object Object methods to a struct (like all the other objects, so there not free functions

[codecov]

Codecov Report

Merging #689 into master will decrease coverage by 0.07%.
The diff coverage is 34.58%.

@@            Coverage Diff             @@
##           master     #689      +/-   ##
==========================================
- Coverage   71.78%   71.70%   -0.08%     
==========================================
  Files         198      199       +1     
  Lines       13852    13863      +11     
==========================================
- Hits         9944     9941       -3     
- Misses       3908     3922      +14     

Impacted Files	Coverage Δ
boa/src/builtins/array/mod.rs	76.65% <ø> (ø)
boa/src/builtins/bigint/mod.rs	70.00% <ø> (ø)
boa/src/builtins/boolean/mod.rs	36.66% <ø> (ø)
boa/src/builtins/date/mod.rs	56.45% <ø> (ø)
boa/src/builtins/date/tests.rs	99.18% <ø> (ø)
boa/src/builtins/error/mod.rs	32.00% <ø> (ø)
boa/src/builtins/error/range.rs	77.27% <ø> (ø)
boa/src/builtins/error/reference.rs	77.27% <ø> (ø)
boa/src/builtins/error/syntax.rs	59.09% <ø> (ø)
boa/src/builtins/error/type.rs	77.27% <ø> (ø)
... and 20 more

---

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[github-actions]

Benchmark for 55f800b

Click to view benchmark

Test	PR Benchmark	Master Benchmark	%
Arithmetic operations (Execution)	386.3±22.61ns	357.3±39.46ns	+8.12%
Arithmetic operations (Full)	236.1±12.34µs	251.5±26.00µs	-6.12%
Array access (Execution)	8.9±0.67µs	8.3±0.92µs	+7.23%
Array access (Full)	292.1±17.83µs	276.7±27.86µs	+5.57%
Array creation (Execution)	3.5±0.19ms	3.1±0.35ms	+12.90%
Array creation (Full)	3.5±0.20ms	3.4±0.26ms	+2.94%
Array pop (Execution)	1264.0±88.00µs	1086.2±82.84µs	+16.37%
Array pop (Full)	1598.1±85.40µs	1600.1±162.66µs	-0.12%
Boolean Object Access (Execution)	5.2±0.35µs	4.6±0.37µs	+13.04%
Boolean Object Access (Full)	281.6±26.13µs	258.2±22.39µs	+9.06%
Clean js (Execution)	772.6±53.38µs	716.7±69.05µs	+7.80%
Clean js (Full)	1026.9±109.75µs	1005.2±98.85µs	+2.16%
Clean js (Parser)	36.8±4.45µs	36.8±4.30µs	0.00%
Create Realm	498.1±37.71ns	450.7±45.55ns	+10.52%
Dynamic Object Property Access (Execution)	6.1±0.45µs	5.4±0.36µs	+12.96%
Dynamic Object Property Access (Full)	289.4±22.15µs	273.4±20.85µs	+5.85%
Expression (Parser)	6.7±0.73µs	6.3±0.49µs	+6.35%
Fibonacci (Execution)	938.9±47.58µs	866.8±86.29µs	+8.32%
Fibonacci (Full)	1258.3±211.74µs	1201.0±142.97µs	+4.77%
For loop (Execution)	24.5±2.24µs	21.8±1.53µs	+12.39%
For loop (Full)	320.6±20.01µs	291.5±30.82µs	+9.98%
For loop (Parser)	18.0±1.95µs	17.5±1.82µs	+2.86%
Goal Symbols (Parser)	11.5±0.89µs	11.7±1.14µs	-1.71%
Hello World (Parser)	3.0±0.32µs	3.0±0.27µs	0.00%
Long file (Parser)	752.4±59.39ns	777.5±76.71ns	-3.23%
Mini js (Execution)	708.8±50.90µs	650.1±72.31µs	+9.03%
Mini js (Full)	908.2±80.06µs	940.6±91.53µs	-3.44%
Mini js (Parser)	31.5±3.37µs	32.7±3.34µs	-3.67%
Number Object Access (Execution)	4.0±0.36µs	3.7±0.39µs	+8.11%
Number Object Access (Full)	259.0±24.97µs	263.2±25.09µs	-1.60%
Object Creation (Execution)	5.2±0.47µs	4.6±0.44µs	+13.04%
Object Creation (Full)	289.0±22.68µs	273.9±28.33µs	+5.51%
RegExp (Execution)	77.4±6.78µs	71.0±8.03µs	+9.01%
RegExp (Full)	340.2±44.76µs	374.4±43.54µs	-9.13%
RegExp Literal (Execution)	77.8±6.02µs	72.3±8.42µs	+7.61%
RegExp Literal (Full)	364.8±34.96µs	348.5±36.98µs	+4.68%
RegExp Literal Creation (Execution)	76.2±5.52µs	66.5±6.09µs	+14.59%
RegExp Literal Creation (Full)	361.9±26.76µs	338.0±36.18µs	+7.07%
Static Object Property Access (Execution)	5.6±0.44µs	5.2±0.56µs	+7.69%
Static Object Property Access (Full)	296.5±22.05µs	277.6±31.12µs	+6.81%
String Object Access (Execution)	7.7±0.62µs	6.8±0.48µs	+13.24%
String Object Access (Full)	264.7±23.88µs	275.2±28.08µs	-3.82%
String comparison (Execution)	7.1±0.68µs	6.5±0.75µs	+9.23%
String comparison (Full)	269.3±28.14µs	275.5±32.41µs	-2.25%
String concatenation (Execution)	5.6±0.43µs	5.2±0.52µs	+7.69%
String concatenation (Full)	260.1±24.92µs	265.9±27.11µs	-2.18%
String copy (Execution)	4.3±0.33µs	3.8±0.31µs	+13.16%
String copy (Full)	262.2±27.13µs	257.9±25.26µs	+1.67%
Symbols (Execution)	3.5±0.28µs	3.1±0.24µs	+12.90%
Symbols (Full)	256.6±22.59µs	239.4±22.83µs	+7.18%