Move .form-control and .form-select to --tblr-control-* tokens (#3163)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

.changeset/form-check-tokens.md

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+---
+"@tabler/core": minor
+"@tabler/docs": patch
+---
+
+Added `--tblr-form-check-*` and `--tblr-form-switch-*` variables, with shared `--tblr-control-checked-bg` and disabled tokens on `:root`.

.changeset/form-control-tokens.md

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+---
+"@tabler/core": minor
+"@tabler/docs": patch
+---
+
+Added `--tblr-control-*` variables to `.form-control` and `.form-select`; sizes and the file button now follow them.

.changeset/form-partials-tokens.md

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+---
+"@tabler/core": minor
+---
+
+Updated icon addons, select groups, `.col-form-label`, validation icons, OTP and Tom Select to read the `--tblr-control-*` and `--tblr-btn-input-*` variables.

.changeset/form-select-size-height.md

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+---
+"@tabler/core": minor
+---
+
+Fixed `.form-select-sm` and `.form-select-lg` height to match `.form-control-sm` and `.form-control-lg`. Small buttons, inputs and selects are now 32px tall instead of 28px. Fixed the font size of a small Tom Select to match a small native select.

.changeset/forms-css-variables-docs.md

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+---
+"@tabler/docs": patch
+---
+
+Added the Forms → CSS variables page: the control scale, state colors and every `--tblr-control-*`, add-on, floating, range, check and switch token.

.changeset/input-group-floating-range-tokens.md

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+---
+"@tabler/core": minor
+"@tabler/docs": patch
+---
+
+Added `--tblr-input-group-addon-*`, `--tblr-form-floating-*` and `--tblr-range-*` variables to input groups, floating labels and range inputs.