Adding the template diagrams from TNO in TNA

[ricardoavelino]

Template meshes are added for:

• circular arrangements
• rectangular arrangements
• linear arrangements

A helper function to define supports in these diagrams and to find corners is also added.

TODO: move to appropriate pattern and possibly simplify/review the logic

[ricardoavelino]

Added

• Added comprehensive form diagram creation methods to FormDiagram class:
  • create_cross() - Creates cross discretisation with orthogonal arrangement and quad diagonals
  • create_fan() - Creates fan discretisation with straight lines to corners
  • create_parametric_fan() - Creates parametric fan diagrams with lambda parameter control
  • create_cross_with_diagonal() - Creates cross discretisation with diagonal lines
  • create_ortho() - Creates orthogonal discretisation
  • create_circular_radial() - Creates circular radial form diagrams with equally spaced hoops
  • create_circular_radial_spaced() - Creates circular radial form diagrams with hemispheric spacing
  • create_circular_spiral() - Creates circular spiral form diagrams
  • create_arch() - Creates arch form diagrams with semicircular projection
  • create_arch_equally_spaced() - Creates arch form diagrams with equally spaced nodes
• Added support assignment methods:
  • assign_support_type() - Assigns supports based on type ("corners" or "all")
• Added corner detection functionality:
  • corner_vertices() - Identifies corner vertices on boundary with configurable angle threshold
• Added comprehensive mesh creation functions in diagram_rectangular.py:
  • create_cross_mesh() - Creates cross pattern meshes
  • create_fan_mesh() - Creates fan pattern meshes
  • create_parametric_fan_mesh() - Creates parametric fan meshes with lambda interpolation
  • create_cross_with_diagonal_mesh() - Creates cross meshes with diagonals
  • create_ortho_mesh() - Creates orthogonal grid meshes
• Added circular mesh creation functions in diagram_circular.py:
  • create_circular_radial_mesh() - Creates circular radial meshes
  • create_circular_radial_spaced_mesh() - Creates hemispherically spaced circular meshes
  • create_circular_spiral_mesh() - Creates circular spiral meshes
• Added arch mesh creation functions in diagram_arch.py:
  • create_arch_linear_mesh() - Creates arch meshes with semicircular projection
  • create_arch_linear_equally_spaced_mesh() - Creates arch meshes with equally spaced nodes

Changed

• Refactored parameter passing from xy_span=[[x0, x1], [y0, y1]] to x_span=(x0, x1), y_span=(y0, y1) for better API consistency
• Changed center parameter from list to tuple in circular diagram functions for immutability and consistency
• Updated function signatures to use single-line format for Black compatibility
• Improved code formatting and linting across all diagram generation files
• Fixed various spelling errors and documentation formatting issues
• Renamed create_delta_form() to create_cross_with_diagonal() for better clarity
• Updated support assignment to use is_support attribute instead of deprecated is_fixed
• Removed deprecated form.parameters usage from all form creation methods

[ricardoavelino]

@tomvanmele little reminder