docs: add JSDoc to component props and story descriptions, update claude.md and other small build fixes

[Arthurk12]

What does this PR do?

Housekeepingh tasks:

• docs: add JSDoc to component props and story descriptions
  Documents every public prop across all component types.ts/type.ts files so IDE autocomplete surfaces what each prop does, reusing the wording already written for Storybook's argTypes where available. Also adds a one-line description above every named story export explaining what it demonstrates.
  Adds eslint-plugin-jsdoc with jsdoc/multiline-blocks and jsdoc/lines-before-block, scoped to types.ts/type.ts, to keep prop JSDoc single-line with a blank line above going forward.

• docs(BBBTypography): add stories for every typography variant
  Only Default and Header were covered before, leaving selected, text2, text3, and button undocumented in Storybook. Adds one story per missing variant plus an AllVariants story that renders them all side by side for quick visual comparison.

• docs: add CLAUDE.md with component/prop/commit conventions
  Captures which files to create/update when adding a new component or a new prop to an existing one, and the commit type/scope conventions this repo relies on for automatic changelog and version generation.

• chore(build): target ES2017 instead of ES5
  The browserslist config already excludes dead browsers (which covers IE11), and this library's own peer deps — react@^18 and @mui/material@^6||^7 — dropped IE11 support already. Targeting ES5 was just adding class/generator-emulation overhead for a browser baseline nothing here actually supports anymore.

• fix(build): exclude dist/ from tsconfig.json's file discovery
  Without an explicit "include", tsc scans the whole project directory for inputs. Since "dist" wasn't excluded, any previously-built .d.ts files sitting there got picked up as inputs too, colliding with the compiler's own declaration output path (TS5055) whenever the project was type-checked directly (e.g. by the editor) instead of built via webpack/ts-loader, which follows the entry graph and never hit this.

Closes Issue(s)

N/A