Another bandstructure overhaul: linecuts and parametric mappings

[pablosanjose]

Closes #77
This implements the design at the end of in #77. In summary

• We can now do mappings (renamed from lifts) in bandstructure that take kwargs in the ParametricHamiltonian case

bandstructure(h, mesh_2D; mapping = (x, y) -> (x, y)) # periodic Hamiltonian
bandstructure(ph, mesh_2D; mapping = (x, y) -> (x, (; kw1 = y))) # periodic ParametricHamiltonian
bandstructure(ph, mesh_2D; mapping = (x, y) -> (; kw1 = x * y)) # bounded ParametricHamiltonian

Note that the number of Bloch phases preceding the NamedTuple must now exactly match the Hamiltonian's (or ParametricHamiltonian`s) lattice dimension

• We build meshes with mesh now, not marchingmesh.

• We deprecate linearmesh in favor of the syntax bandstructure(h, nodes...; points = 13, kw...). We can now do things like

bandstructure(h, :Γ, :X, (π, π), :Y, :Γ; points = (4,5,6,7))

• We can do mesh vertices transforms in bandstructure with transform = (fv, fϵ), where fv now transforms the mesh, and fϵ the eigenvalues. Optionally we can do transform = isometric or transform = (isometric, fϵ) to transform the mesh into momenta, assuming the mesh spans Bloch phases.

julia> h = LatticePresets.honeycomb() |> hamiltonian(hopping(I), orbitals = (Val(2), Val(1)));

julia> b = bandstructure(h, transform = isometric)
Bandstructure{2}: collection of 2D bands
  Bands        : 2
  Element type : scalar (Complex{Float64})
  Mesh{2}: mesh of a 2-dimensional manifold
    Vertices   : 169
    Edges      : 456

julia> using Makie; plot(b)

[codecov-commenter]

Codecov Report

Merging #107 into master will decrease coverage by 0.88%.
The diff coverage is 82.67%.

@@            Coverage Diff             @@
##           master     #107      +/-   ##
==========================================
- Coverage   62.40%   61.52%   -0.89%     
==========================================
  Files          16       16              
  Lines        2708     2708              
==========================================
- Hits         1690     1666      -24     
- Misses       1018     1042      +24     

Impacted Files	Coverage Δ
src/Quantica.jl	100.00% <ø> (ø)
src/parametric.jl	77.89% <ø> (-3.72%)	⬇️
src/plot_makie.jl	0.00% <0.00%> (ø)
src/mesh.jl	83.76% <75.00%> (-9.58%)	⬇️
src/bandstructure.jl	87.84% <82.75%> (-3.32%)	⬇️
src/hamiltonian.jl	75.08% <83.33%> (-0.21%)	⬇️
src/diagonalizer.jl	52.94% <100.00%> (-0.85%)	⬇️
src/model.jl	72.66% <100.00%> (ø)
src/tools.jl	55.93% <100.00%> (-1.52%)	⬇️
... and 3 more

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