Add high l for hyperfine and use new ryd-numerov for angular calculations

[johannes-moegerle]

• add single_channel_fj_models to include high-l states for species with I!=0
• use the new ryd-numerov package to calculate exp and std for these new fj single channel states
• replace the old exp_q and std_q functions with the new ones from ryd-numerov, this fixes the following problems for the pairinteraction database:
  • std_l and std_s: some 0 before, now actual std
  • exp_s mixed up for different j_ryd
    It should be e.g.:
    JJ(i_c=0.0, s_c=0.5, l_c=0, s_r=0.5, l_r=5, j_c=0.5, j_r=4.5, j_tot=5.0, f_tot=5.0): <s_tot>=0.5454545454545454
    JJ(i_c=0.0, s_c=0.5, l_c=0, s_r=0.5, l_r=5, j_c=0.5, j_r=5.5, j_tot=5.0, f_tot=5.0): <s_tot>=0.4545454545454545
    it was the other way around before.
• remove the struct DataBaseState and DataBaseArray in favor of just using BasisState and BasisArray (which were updated accordingly)

Related PRs

pairinteraction/ryd-numerov#38
pairinteraction/database-mqdt#7

[johannes-moegerle]

is split up into #18 #25 and #20