Fix issues

[kdy1]

swc_bundler:

• Support emitting iife. (Closes swc_bundler: support outputting an IIFE #1184)

swc_ecma_parser:

• Auto-detect script / module (Closes Automatically detect if file is script or module when parsing #1164)
• lexer: Error recovery for strict mode and module mode.
• More error recovery logic for strict mode violation.
• Fix panic on invalid input. (Closes panic: Parser panics on malformed TypeScript code #1170)

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Postponed tasks

swc_ecma_codegen:

• Print escapes correctly. (Not all Unicode Escape Sequences are escaped correctly, leading to "Unterminated string constant" errors #1187)

swc_ecma_parser:

• Preserve unicode escape sequences as-is. (Suggestion: Don't rewrite unicode escape sequences to unicode #1188)

[kdy1]

i decided to split this pr into two parts.