Small cleanups: dead code, version string, Loudmouth regex (#40, #41, #28)

[dbqpdb]

Summary

Three small, independent fixes that don't conflict with anything else in flight. Each is one commit.

• f3cd387 — Cleanup: remove dead code paths #40 dead code. Removed sillyDude() and run_him_if_i_am_not_the_main_file() + the trailing else branch that called it on every import. (Third bullet in Cleanup: remove dead code paths #40, runFromOutside.py, is already covered by PR Quick bug bag: six independent small fixes (#29, #30, #31, #32, #33, #36) #49.)
• cd59d8a — Cleanup: store versionNumber as a string, not a float #41 version string. versionNumber = 0.40 → __version__ = "0.40". Float versioning has both an equality issue (0.40 == 0.4) and an ordering issue (0.10 < 0.9 as floats). Dunder name is conventional.
• 2bab115 — Fix typo, regularize RegEx #28 Loudmouth regex. The two regex calls in Loudmouth.propound used slightly different patterns (\{.+?\} vs \{.*?\}). Now compiled once as a raw string and reused — same pattern in both call sites. Side effect: the \{ invalid-escape SyntaxWarning is gone.

Test plan

• TestRLM().run_all_tests() — all 4 pass.
• import rlm; rlm.__version__ returns "0.40".
• No more \{ SyntaxWarning at import. (Tuple-assert SyntaxWarning still present — that's Bug: assert(cond, 'msg') tuple form is always truthy in TestRLM #32, fixed in PR Quick bug bag: six independent small fixes (#29, #30, #31, #32, #33, #36) #49.)

Why these are bundled

All three are independent of the other six open PRs:

• Cleanup: remove dead code paths #40 deletes functions in the top-level / Loudmouth-adjacent area — not touched by Type hints for Board + Move; mypy CI workflow (advisory) (#46) #54/Inline docs: docstrings + comment cleanup for Board + Move (#47) #55/Types + docs follow-up: Player/Game/GameController/Piece subclasses (#46, #47) #56 (which are scoped to Board/Move/Player/Game/Piece).
• Cleanup: store versionNumber as a string, not a float #41 is a one-line change at the very top of the file.
• Fix typo, regularize RegEx #28 is in Loudmouth.propound, also outside the Type hints for Board + Move; mypy CI workflow (advisory) (#46) #54-56 scope.

No rebase friction expected against any of the existing PRs.

Closes #40, #41, #28.

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