refactor: rename misc/ to scripts/ for a more descriptive directory name

[kitsuyui]

The misc/ directory contained a single shell script (make-lucky.sh) under a generic, non-descriptive name. misc/ conveys no intent about the directory's responsibility, making it harder for contributors to understand where utility scripts live.

This renames the directory to scripts/, which is a conventional location for shell utility scripts and clearly communicates the directory's purpose.

No functional changes — the script itself is unmodified.

[github-actions]

🎉 Happy commit!

• dogfooding: PR refactor: rename misc/ to scripts/ for a more descriptive directory name #850 always celebrates.
• dogfooding: 3dd80e6fa5462aa47a749e341ddb0931e413751e always celebrates.

[github-actions]

Code Metrics Report

	main (8bad195)	#850 (6715226)	+/-
Coverage	99.2%	99.2%	0.0%
Code to Test Ratio	1:1.3	1:1.3	0.0
Test Execution Time	2s	1s	-1s

Details

  |                     | main (8bad195) | #850 (6715226) | +/-  |
  |---------------------|----------------|----------------|------|
  | Coverage            |          99.2% |          99.2% | 0.0% |
  |   Files             |              5 |              5 |    0 |
  |   Lines             |            134 |            134 |    0 |
  |   Covered           |            133 |            133 |    0 |
  | Code to Test Ratio  |          1:1.3 |          1:1.3 |  0.0 |
  |   Code              |            723 |            723 |    0 |
  |   Test              |            955 |            955 |    0 |
+ | Test Execution Time |             2s |             1s |  -1s |

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Reported by octocov