feat: Ket2 solid phase support

[haditariq]

PR resolves: Issue#166.

• format to save info: molfile with custom ELN tags.
• transform a ketcher1 molfile with surface tag into ket2
• User can use templates

Demo:

1- Basic Usage image template

k2SC.image.template.usage.mp4

2- Molfile compatibility with Ketcherrails and ketcher2

k2SC.-.Rails.and.ketcher2.compatibility.mp4

3- Modify image templates with new user templates

k2SC.-.use.template.with.image.templates.1.mp4

4- Redo and Undo features

redo.and.undo.feature.1.mp4

5- Erase Del

20241108-1458-05.8099941.mp4

6- Layout

K2SC.-.demo.vis.1.mp4

---

• rather 1-story 1-commit than sub-atomic commits

• commit title is meaningful => git history search

• commit description is helpful => helps the reviewer to understand the changes

• code is up-to-date with the latest developments of the target branch (rebased to it or whatever) => ⏩-merge for linear history is favoured

• added code is linted

• tests are passing (at least locally): we still have some random test failure on CI. thinking of asking spec/examples.txt to be commited

• in case the changes are visible to the end-user,  video or screenshots should be added to the PR => helps with user testing

• testing coverage improvement is improved.

• CHANGELOG :  add a bullet point on top (optional: reference to github issue/PR )

• parallele PR for documentation  on docusaurus  if the feature/fix is tagged for a release