Add CHANGELOG.md

Author: monstermichl

CHANGELOG.md

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+# TypeShell changelog
+
+## v0.2.0 - 2025-09-21
+### New
+- Add type definition support (https://github.com/monstermichl/TypeShell/issues/45).
+- Add constants support (https://github.com/monstermichl/TypeShell/issues/41).
+- Add struct support (https://github.com/monstermichl/TypeShell/issues/51).
+- Allow passing of structs to functions as pointer (https://github.com/monstermichl/TypeShell/issues/63).
+- Add function receiver support (https://github.com/monstermichl/TypeShell/issues/64).
+- Add support for remote imports (https://github.com/monstermichl/TypeShell/issues/46).
+- Include std in release (https://github.com/monstermichl/TypeShell/issues/43).
+- Add for-range support for numbers (https://github.com/monstermichl/TypeShell/issues/51).
+- Make subscript available on string literals (https://github.com/monstermichl/TypeShell/issues/15).
+- Add os std library.
+
+### Improvements
+- Performance improvements of str strings.
+
+### Fixes
+- Multiple imports lead to error (https://github.com/monstermichl/TypeShell/issues/40).
+- If a variable is re-defined with other variables, it's not considered a new variable (https://github.com/monstermichl/TypeShell/issues/42).
+- Print with spaces only shows echo off message (Batch) (https://github.com/monstermichl/TypeShell/issues/53).
+- Subtraction is not considered subtraction if number comes directly after minus (https://github.com/monstermichl/TypeShell/issues/62).
+- Using imported variables/constants doesn't work (https://github.com/monstermichl/TypeShell/issues/49).
+  
+## v0.1.1 - 2025-07-05
+### New
+- Allow execution of non-local/non-PATH executables/scripts (see https://github.com/monstermichl/TypeShell?tab=readme-ov-file#programsscripts) (https://github.com/monstermichl/TypeShell/issues/35).
+
+### Fixes
+- Handle exclamation marks correctly in string literals (file read/writes don't work correctly yet) (Batch) (https://github.com/monstermichl/TypeShell/issues/33).
+
+## v0.1.1 - 2025-06-21
+### New
+- Add raw string support (https://github.com/monstermichl/TypeShell/issues/31).
+- Add support for single variable in for-range loops (https://github.com/monstermichl/TypeShell/issues/29).
+- Add Split function to std/strings.tsh.
+- Add find example for Windows and Linux.
+
+### Fixes
+- Len on empty string (Batch) (https://github.com/monstermichl/TypeShell/issues/32).
+- Substring newline handling (Bash).
+- Negation handling (https://github.com/monstermichl/TypeShell/issues/30).
+
+## v0.1.0 - 2025-06-19
+### New
+- First release