feat(chip): add shape to ionic theme (#29303)

Issue number: None

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## What is the new behavior?
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this PR. -->

- Added new prop `shape`, only supported on Ionic Theme.
- Added scss for the different shapes.
- Added missing scss for font-weight and line-height.
- Added missing tests for focus state and new tests for shape.
- Added new font weight and line-height design tokens. This change
uncovered an issue on the IOnic Typography tests that resulted on
snapshots differences.
- Added & updated new snapshot baselines.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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Co-authored-by: Brandy Carney <brandyscarney@users.noreply.github.com>
Co-authored-by: Sean Perkins <sean@ionic.io>
Co-authored-by: Sean Perkins <13732623+sean-perkins@users.noreply.github.com>

core/src/foundations/ionic.root.scss

@@ -89,6 +89,7 @@
   --ionic-font-line-height-xxl: 36px;
   --ionic-font-line-height-display-s: 44px;
   --ionic-font-line-height-display-m: 48px;
+  --ionic-font-line-height-full: 100%;
   --ionic-font-size-h1: 28px;
   --ionic-font-size-h2: 32px;
   --ionic-font-size-h3: 24px;
@@ -102,6 +103,7 @@
   --ionic-font-size-l: 16px;
   --ionic-font-weight-light: 300;
   --ionic-font-weight-regular: 400;
+  --ionic-font-weight-medium: 500;
   --ionic-font-weight-semi-bold: 600;
   --ionic-font-weight-bold: 700;
   --ionic-space-none: 0;